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Summary: Inherited Constants | Ctors | Methods | Inherited Methods

# SpannableString

`public class SpannableString`
`extends Object` `implements CharSequence, GetChars, Spannable`

java.lang.Object
↳ | android.text.SpannableString

This is the class for text whose content is immutable but to which markup objects can be attached and detached. For mutable text, see `SpannableStringBuilder`.

## Summary

### Inherited constants
From interface `android.text.Spanned`
`int` | `SPAN_COMPOSING` This flag is set on spans that are being used to apply temporary styling information on the composing text of an input method, so that they can be found and removed when the composing text is being replaced.
`int` | `SPAN_EXCLUSIVE_EXCLUSIVE` Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand to include text inserted at either their starting or ending point.
`int` | `SPAN_EXCLUSIVE_INCLUSIVE` Non-0-length spans of type SPAN_EXCLUSIVE_INCLUSIVE expand to include text inserted at their ending point but not at their starting point.
`int` | `SPAN_INCLUSIVE_EXCLUSIVE` Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand to include text inserted at their starting point but not at their ending point.
`int` | `SPAN_INCLUSIVE_INCLUSIVE` Spans of type SPAN_INCLUSIVE_INCLUSIVE expand to include text inserted at either their starting or ending point.
`int` | `SPAN_INTERMEDIATE` This flag will be set for intermediate span changes, meaning there is guaranteed to be another change following it.
`int` | `SPAN_MARK_MARK` 0-length spans with type SPAN_MARK_MARK behave like text marks: they remain at their original offset when text is inserted at that offset.
`int` | `SPAN_MARK_POINT` SPAN_MARK_POINT is a synonym for `SPAN_INCLUSIVE_INCLUSIVE`.
`int` | `SPAN_PARAGRAPH` SPAN_PARAGRAPH behaves like SPAN_INCLUSIVE_EXCLUSIVE (SPAN_MARK_MARK), except that if either end of the span is at the end of the buffer, that end behaves like _POINT instead (so SPAN_INCLUSIVE_INCLUSIVE if it starts in the middle and ends at the end, or SPAN_EXCLUSIVE_INCLUSIVE if it both starts and ends at the end).
`int` | `SPAN_POINT_MARK` SPAN_POINT_MARK is a synonym for `SPAN_EXCLUSIVE_EXCLUSIVE`.
`int` | `SPAN_POINT_MARK_MASK` Bitmask of bits that are relevent for controlling point/mark behavior of spans.
`int` | `SPAN_POINT_POINT` 0-length spans with type SPAN_POINT_POINT behave like cursors: they are pushed forward by the length of the insertion when text is inserted at their offset.
`int` | `SPAN_PRIORITY` The bits specified by the SPAN_PRIORITY bitmap determine the order of change notifications -- higher numbers go first.
`int` | `SPAN_PRIORITY_SHIFT` The bits numbered just above SPAN_PRIORITY_SHIFT determine the order of change notifications -- higher numbers go first.
`int` | `SPAN_USER` The bits specified by the SPAN_USER bitfield are available for callers to use to store scalar data associated with their span object.
`int` | `SPAN_USER_SHIFT` The bits numbered SPAN_USER_SHIFT and above are available for callers to use to store scalar data associated with their span object.

### Public constructors
`SpannableString(CharSequence source)` For the backward compatibility reasons, this constructor copies all spans including `NoCopySpan`.

### Public methods
`final char` | `charAt(int i)` Returns the `char` value at the specified index.
`boolean` | `equals(Object o)` Indicates whether some other object is "equal to" this one.
`final void` | `getChars(int start, int end, char[] dest, int off)` Exactly like String.getChars(): copy chars `start` through `end - 1` from this CharSequence into `dest` beginning at offset `destoff`.
`int` | `getSpanEnd(Object what)` Return the end of the range of text to which the specified markup object is attached, or -1 if the object is not attached.
`int` | `getSpanFlags(Object what)` Return the flags that were specified when `Spannable#setSpan` was used to attach the specified markup object, or 0 if the specified object has not been attached.
`int` | `getSpanStart(Object what)` Return the beginning of the range of text to which the specified markup object is attached, or -1 if the object is not attached.
`<T> T[]` | `getSpans(int queryStart, int queryEnd, Class<T> kind)` Return an array of the markup objects attached to the specified slice of this CharSequence and whose type is the specified type or a subclass of it.
`int` | `hashCode()` Returns a hash code value for the object.
`final int` | `length()` Returns the length of this character sequence.
`int` | `nextSpanTransition(int start, int limit, Class kind)` Return the first offset greater than `start` where a markup object of class `type` begins or ends, or `limit` if there are no starts or ends greater than `start` but less than `limit`.
`void` | `removeSpan(Object what)` Remove the specified object from the range of text to which it was attached, if any.
`void` | `setSpan(Object what, int start, int end, int flags)` Attach the specified markup object to the range `start…end` of the text, or move the object to that range if it was already attached elsewhere.
`final CharSequence` | `subSequence(int start, int end)` Returns a `CharSequence` that is a subsequence of this sequence.
`final String` | `toString()` Returns a string representation of the object.
`static SpannableString` | `valueOf(CharSequence source)`

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
From interface `java.lang.CharSequence`
`abstract char` | `charAt(int index)` Returns the `char` value at the specified index.
`default IntStream` | `chars()` Returns a stream of `int` zero-extending the `char` values from this sequence.
`default IntStream` | `codePoints()` Returns a stream of code point values from this sequence.
`abstract int` | `length()` Returns the length of this character sequence.
`abstract CharSequence` | `subSequence(int start, int end)` Returns a `CharSequence` that is a subsequence of this sequence.
`abstract String` | `toString()` Returns a string containing the characters in this sequence in the same order as this sequence.
From interface `android.text.GetChars`
`abstract void` | `getChars(int start, int end, char[] dest, int destoff)` Exactly like String.getChars(): copy chars `start` through `end - 1` from this CharSequence into `dest` beginning at offset `destoff`.
From interface `android.text.Spannable`
`abstract void` | `removeSpan(Object what)` Remove the specified object from the range of text to which it was attached, if any.
`abstract void` | `setSpan(Object what, int start, int end, int flags)` Attach the specified markup object to the range `start…end` of the text, or move the object to that range if it was already attached elsewhere.
From interface `android.text.Spanned`
`abstract int` | `getSpanEnd(Object tag)` Return the end of the range of text to which the specified markup object is attached, or -1 if the object is not attached.
`abstract int` | `getSpanFlags(Object tag)` Return the flags that were specified when `Spannable#setSpan` was used to attach the specified markup object, or 0 if the specified object has not been attached.
`abstract int` | `getSpanStart(Object tag)` Return the beginning of the range of text to which the specified markup object is attached, or -1 if the object is not attached.
`abstract <T> T[]` | `getSpans(int start, int end, Class<T> type)` Return an array of the markup objects attached to the specified slice of this CharSequence and whose type is the specified type or a subclass of it.
`abstract int` | `nextSpanTransition(int start, int limit, Class type)` Return the first offset greater than `start` where a markup object of class `type` begins or ends, or `limit` if there are no starts or ends greater than `start` but less than `limit`.

## Public constructors

### SpannableString

    public SpannableString (CharSequence source)

For the backward compatibility reasons, this constructor copies all spans including `NoCopySpan`.

Parameters
`source` | `CharSequence`: source text

## Public methods

### charAt

    public final char charAt (int i)

Returns the `char` value at the specified index. An index ranges from zero to `length() - 1`. The first `char` value of the sequence is at index zero, the next at index one, and so on, as for array indexing.

If the `char` value specified by the index is a surrogate, the surrogate value is returned.

Parameters
`i` | `int`: the index of the `char` value to be returned

Returns
`char` | the specified `char` value

### equals

    public boolean equals (Object o)

Indicates whether some other object is "equal to" this one.

The `equals` method implements an equivalence relation on non-null object references:

- It is reflexive: for any non-null reference value `x`, `x.equals(x)` should return `true`.
- It is symmetric: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`.
- It is transitive: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`.
- It is consistent: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified.
- For any non-null reference value `x`, `x.equals(null)` should return `false`.

The `equals` method for class `Object` implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values `x` and `y`, this method returns `true` if and only if `x` and `y` refer to the same object (`x == y` has the value `true`).

Note that it is generally necessary to override the `hashCode` method whenever this method is overridden, so as to maintain the general contract for the `hashCode` method, which states that equal objects must have equal hash codes.

Parameters
`o` | `Object`: the reference object with which to compare.

Returns
`boolean` | `true` if this object is the same as the obj argument; `false` otherwise.

### getChars

    public final void getChars (int start,
                    int end,
                    char[] dest,
                    int off)

Exactly like String.getChars(): copy chars `start` through `end - 1` from this CharSequence into `dest` beginning at offset `destoff`.

Parameters
`start` | `int`
`end` | `int`
`dest` | `char`
`off` | `int`

### getSpanEnd

    public int getSpanEnd (Object what)

Return the end of the range of text to which the specified markup object is attached, or -1 if the object is not attached.

Parameters
`what` | `Object`

Returns
`int` |

### getSpanFlags

    public int getSpanFlags (Object what)

Return the flags that were specified when `Spannable#setSpan` was used to attach the specified markup object, or 0 if the specified object has not been attached.

Parameters
`what` | `Object`

Returns
`int` |

### getSpanStart

    public int getSpanStart (Object what)

Return the beginning of the range of text to which the specified markup object is attached, or -1 if the object is not attached.

Parameters
`what` | `Object`

Returns
`int` |

### getSpans

    public T[] getSpans (int queryStart,
                    int queryEnd,
                    Class<T> kind)

Return an array of the markup objects attached to the specified slice of this CharSequence and whose type is the specified type or a subclass of it. Specify Object.class for the type if you want all the objects regardless of type.

Parameters
`queryStart` | `int`
`queryEnd` | `int`
`kind` | `Class`

Returns
`T[]` |

### hashCode

    public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by `HashMap`.

The general contract of `hashCode` is:

- Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
- If two objects are equal according to the `equals(Object)` method, then calling the `hashCode` method on each of the two objects must produce the same integer result.
- It is not required that if two objects are unequal according to the `equals(java.lang.Object)` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class `Object` does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Returns
`int` | a hash code value for this object.

### length

    public final int length ()

Returns the length of this character sequence. The length is the number of 16-bit `char`s in the sequence.

Returns
`int` | the number of `char`s in this sequence

### nextSpanTransition

    public int nextSpanTransition (int start,
                    int limit,
                    Class kind)

Return the first offset greater than `start` where a markup object of class `type` begins or ends, or `limit` if there are no starts or ends greater than `start` but less than `limit`. Specify `null` or Object.class for the type if you want every transition regardless of type.

Parameters
`start` | `int`
`limit` | `int`
`kind` | `Class`

Returns
`int` |

### removeSpan

    public void removeSpan (Object what)

Remove the specified object from the range of text to which it was attached, if any. It is OK to remove an object that was never attached in the first place.

Parameters
`what` | `Object`

### setSpan

    public void setSpan (Object what,
                    int start,
                    int end,
                    int flags)

Attach the specified markup object to the range `start…end` of the text, or move the object to that range if it was already attached elsewhere. See `Spanned` for an explanation of what the flags mean. The object can be one that has meaning only within your application, or it can be one that the text system will use to affect text display or behavior. Some noteworthy ones are the subclasses of `CharacterStyle` and `ParagraphStyle`, and `TextWatcher` and `SpanWatcher`.

Parameters
`what` | `Object`
`start` | `int`
`end` | `int`
`flags` | `int`

### subSequence

    public final CharSequence subSequence (int start,
                    int end)

Returns a `CharSequence` that is a subsequence of this sequence. The subsequence starts with the `char` value at the specified index and ends with the `char` value at index `end - 1`. The length (in `char`s) of the returned sequence is `end - start`, so if `start == end` then an empty sequence is returned.

Parameters
`start` | `int`: the start index, inclusive
`end` | `int`: the end index, exclusive

Returns
`CharSequence` | the specified subsequence

### toString

    public final String toString ()

Returns a string representation of the object. In general, the `toString` method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The `toString` method for class `Object` returns a string consisting of the name of the class of which the object is an instance, the at-sign character ``@`', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

>      getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
`String` | a string representation of the object.

### valueOf

    public static SpannableString valueOf (CharSequence source)

Parameters
`source` | `CharSequence`

Returns
`SpannableString` |

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